สร้างโมดูล MyCustom
myCustom.module มี
/**
 * Implements hook_date_formats().
 */
function myCustom_date_formats() {
  $formats = array('g:i a', 'H:i', 'M j', 'j M', 'm/d/y', 'd/m/y', 'j/n/y', 'n/j/y');
  $types = array_keys(myCustom_date_format_types());
  $date_formats = array();
  foreach ($types as $type) {
    foreach ($formats as $format) {
      $date_formats[] = array(
        'type' => $type,
        'format' => $format,
        'locales' => array(),
      );
    }
  }
  return $date_formats;
}
/**
 * Implements hook_date_format_types().
 */
function myCustom_date_format_types() {
  return array(
    'myCustom_current_day' => t('MyCustom: Current day'),
    'myCustom_current_year' => t('MyCustom: Current year'),
    'myCustom_years' => t('MyCustom: Other years'),
  );
}
/**
 * Formats a timestamp according to the defines rules.
 *
 * Examples/Rules:
 *
 * Current hour: 25 min ago
 * Current day (but not within the hour): 10:30 am
 * Current year (but not on the same day): Nov 25
 * Prior years (not the current year): 11/25/08
 *
 * @param $timestamp
 *   UNIX Timestamp.
 *
 * @return
 *   The formatted date.
 */
function myCustom_format_date($timestamp) {
  if ($timestamp > ((int)(REQUEST_TIME / 3600)) * 3600) {
    return t('@interval ago', array('@interval' => format_interval(abs(REQUEST_TIME - $timestamp), 1)));
  }
  if ($timestamp > ((int)(REQUEST_TIME / 86400)) * 86400) {
    return format_date($timestamp, 'myCustom_current_day');
  }
  if ($timestamp > mktime(0, 0, 0, 1, 0, date('Y'))) {
    return format_date($timestamp, 'myCustom_current_year');
  }
  return format_date($timestamp, 'myCustom_years');
}
สร้าง myCustom.install และมี
/**
 * @file
 * Install file for myCustom.module
 */
/**
 * Implements hook_install().
 */
function myCustom_install() {
  // Define default formats for date format types.
  variable_set("date_format_myCustom_current_day", 'g:i a');
  variable_set("date_format_myCustom_current_year", 'M j');
  variable_set("date_format_myCustom_years", 'n/j/y');
}
/**
 * Implements hook_uninstall().
 */
function myCustom_uninstall() {
  variable_del('date_format_myCustom_current_day');
  variable_del('date_format_myCustom_current_year');
  variable_del('date_format_myCustom_years');  
}
การใช้งาน: 
echo myCustom_format_date(1392532844);